PCB jointed board structure

The invention relates to the technical field of circuit board production, in particular to a PCB jointed board structure. The PCB jointed board structure comprises a plurality of sub-boards, a first connecting rib and second connecting ribs, each sub-board comprises a long edge, and the long edges are provided with a plurality of concave parts; the long edges of every two adjacent sub-boards are parallel and opposite, and the distance perpendicular to the long edges of every two sub-boards, in the direction of the long edges, at the ends is smaller than that in the middle. Two adjacent concave parts are arranged in the middle and located on different sub-boards; the first connecting rib is located between the two concave parts, and the two ends of the first connecting rib are connected with the sub-boards where the two concave parts are located respectively; the two second connecting ribs are located on the sides, away from the first connecting ribs, of the concave parts respectively, and the two ends of each